| a+2 |
| a(a−2) |
| a−1 |
| (a−2)2 |
| 4−a |
| a(a−2) |
=[
| a+2 |
| a(a−2) |
| a−1 |
| (a−2)2 |
| a(a−2) |
| 4−a |
=
| a+2 |
| 4−a |
| a(a−1) |
| a−2 |
| 1 |
| 4−a |
=
| (a+2)(a−2)−a(a−1) |
| (4−a)(a−2) |
=
| a−4 |
| (4−a)(a−2) |
=-
| a−4 |
| (a−4)(a−2) |
=-
| 1 |
| a−2 |
| a+2 |
| a2−2a |
| a−1 |
| a2−4a+4 |
| 4−a |
| a2−2a |
| a+2 |
| a(a−2) |
| a−1 |
| (a−2)2 |
| 4−a |
| a(a−2) |
| a+2 |
| a(a−2) |
| a−1 |
| (a−2)2 |
| a(a−2) |
| 4−a |
| a+2 |
| 4−a |
| a(a−1) |
| a−2 |
| 1 |
| 4−a |
| (a+2)(a−2)−a(a−1) |
| (4−a)(a−2) |
| a−4 |
| (4−a)(a−2) |
| a−4 |
| (a−4)(a−2) |
| 1 |
| a−2 |